Glass mold having a detachable two-part insert



July 13, 1954 L.. J. LITALIEN ET AL GLASS MOLD HAVING A DETACHABLE TWO-PART INSERT 2 Shee'ts-Sheet 1 Filed Jan. 5, 1953 -La l.

a M MM INVENToRs LnwREA/GE JL/THL/EN By Jose/DH Dur/m vec/f FITToR/VE Y July 13, 1954 L. J. LITALIEN ETAL v 2,683,332

GLASS MOLD HAVING A DETACHABLE Two-PART INSERT Filed Jan. s, 195s 2 sheets-sheet z :-fL-f.. u I I INVENToRS Hm/@ENCE J L/ #7L/EN BY JOSEPH UTHHVECK H TroR/vf Y `mold for every size and shape of hollow ware to be molded therein.v

Patented July 13, 1954 GLASS MOLD HAVING A DETACHABLE TWO-PART INSERT Lawrence J. Litalien, Waterbury, and Joseph Duthaveck, Hartford, Conn., assignors to Dutalite Company, Waterbury, Conn., a partnership Application January 5, 1953, Serial No. 329,612

6 Claims.

This invention relates to blank and blow molds for use in the manufacture of hollow glassware, such as bottles, jars, tumblers, etc.

One object of this invention is to produce a glass forming mold of the above nature con- .structed of exterior cast iron mold sections having detachable wear-resistant inserts, whereby a long mold life may be obtained.

A further object is to provide a mold of the above nature which will be standard -for a plurality of sizes of glassware, and in which the mold may be used in various types of glass making machines.

A further object is to provide a mold of the above nature having high thermal conductivity, low thermal expansion, high resistance to grain growth and scaling, high resistance to wear, and also having efficient cooling ns embedded in and extending through the outer mold sections.

A further object is to provide a mold of the above nature in which the rate of heat transfer through the mold will be enhanced by the use of a copper filler having ns to conduct the heat from the insert to the outer surface of the mold body.

, A further object is to provide a device of the above nature in which the inserts will be made from two complementary rectangular members,

which arehard, tough and highly resistant to shock, wear and abrasion.

A further Objectis to provide a device of theabove nature in which the inserts may be readily order to avoid the necessity of making a complete 'A further object is to provide a mold of the `above nature in which the cooling of the glass the ns for conducting the heat from the inserts to the exterior of the mold.

A further object is to provide a glass mold of the above' nature which will be simple in construction, inexpensive to manufacture, easy to install and manipulate, compact, ornamental in appearance, and very efficient and durable in use.

With these and other objects in View, there has been illustrated on the accompanying'drawings, one form in which the invention may conveniently be embodied in practice.

In the drawings,

`Fig. `1 represents atop plan view of an improved mold with inserts in assembled position.

Fig. 2 is a side elevation of the same.

glassr Fig. 3 is a plan view of the two part neck ring, shown separately.

Fig. 4 is a top plan view of the assembled mold, with the neck ring removed.

Fig. 5 is a vertical cross-sectional View, taken along the line 5--5 of Fig. 1, looking in the direction of the arrows.

Fig. 6 is a plan view of one of the semi-cylindrical cast iron mold sections.

Fig. 7 is an elevational View of the same.

Fig. 8 is a plan View of one of the insert members.

Fig. 9 is an elevational View of the same.

Fig. 10 is a cross-sectional view of one of the cast iron mold sections, taken along 'the line Ill-IIJ of Fig. 7 looking in the direction of the arrows, and showing the shape of the copper cooling filler and fins.

Fig. 11 is a bottom plan View of the base plate of the mold.

Referring now to the drawings, in which like reference numerals denote corresponding parts throughout the several views,

The numerals I 0 and I I indicate a pair of semicylindrical mold body members which preferably are constructed from ASTM specification, class 20 grey cast iron. Such a type of cast iron is open grain and has large graphite ake .distribution in conjunction with low heat expansivity and high thermal conductivity.

The mold body members IU and II are provided with aligned exterior semi-circular flanges Illa and IIb, and have interior cavities I 2 and I3 of rectangular shape.

Extending into the opposite sides of the rectangular cavities I2 and I3, are two pairs of elongated tapered keys I4 and I5, I6 and Il and 'said cavities are adapted to receive, with a sliding fit, a pair of rectangular inserts I8 and I9 having tapered side grooves 20, 2i, 22 and 23, which intert with the keys I4, i5, I 6 and il previously mentioned. The inserts I8, I9 are preferably made from hard, tough, chill-cast iron or any other material which is highly resistant to shock, wear and abrasion.

Near the bottom of the cast iron mold body members I I! and I I, provision is made of two pairs of inwardly extending stop lugs 24 and 25 and 2S and 21, respectively, which limit the downward movement of the insert members I8 and I9 when they are forced into the cavities I 2 and I3 of the mold body members I@ and II.

Provision is also made of a rectangular bottom plate 28 (Figs. 5 and l1), having a raised Circular center section 2a for intertting with the hollow glassware W which is molded within the body members I and ii, and which takes its shape from the inserts IS and I3.

In order to cool the molded glassware W rapidly after the molding is completed, pro-vision is made of a pair of. heat-conducting.copper filler plates 33, embedded .in the cast` iron bodyfmembers I0, i l and having seven rows of spaced tapered ribs 3l, 32, 33 and 34 respectively, arranged in four vertical columns as clearly shown in Fig. 7.

Provision is also made of two pairs of auxiliary lateral tapered cooling fillers, 33 embedded in the respective mold body members HL l i inalignment with the keys le, i5, 16,; l1. rThe illers 30,

35, 3S have low thermal expansivitythus reducing strains and stresses in the molding process. By reason of the high thermal conductivity of the cooling ller members 30, 35, 36, heat will betransferred rapidly anduniformly from the f outer surfaces of the inserts to Ithe.eiteriorof the mold.

The tapered keys lll-41, fitted within the grooves 23-23produce a tight iit between the inserts i8, i3 due to the,expansion ci the hot glass therein, thus preventing said inserts from` getting out of proper alignment.

Operation 1n the operation of molding, the inserts i8. and i9 will be pushed down into the two part mold body members l0, li as far asthey will go,.until they strike the stops 24,25, 25 and 2l von said body members.

To complete the assembly ofthemold, .a rectangular neck ring madeoftwo parts and 40 and having a central apertureAl will then vbe placed at theopen or upper end of the twopart mold, as shown in Fig. 5.

The bottom of the mold will then be closed by inserting the detachable rectangularibottom plate 28 upwardly into thebodyimembers 1 0, Il.

It is to be understood that after a `glass gob 31 has been partially blown ina blank -mold, not shown, it will be nvertedand transferredto the blowy mold herein disclosed ,with a partially-blown cavity38 formed Lwithin mthegob h3 1.

The remainder of theglassxblowing operation will take place within the oavityAZ 'of `the blow mold, producing an article of hollowglassware Wv having uniform thickness and confsorming Aclosely to the shape of the interior of the insert seictions I8 and I9 respectively.

`One advantage of Vthe Vpresent invention is that a single two-part outer cast iron mold'may be used for receiving any number ,of inserts which have the same rexterior dimensions 4and which Aare provided `withfcavvities of diiferent sizes corresponding to the exteriorshape of the bottles, jars, or otherv glassware .articles to be molded.

Other advantages of this invention are its simplicity, its low cost, and the `rapid 4cooling of the molded glassware by the use of the copper `ller plate and fins which conduct the heat rapidly tothe exterior of the mold.

A further advantage is that the tightly tted insert members will minimize extrusions and flash.

1t will be understood that the insert mold herein disclosed is not'limite'd to use in a blow mold but may also b eemployedV in a blanking mold, a parison mold, `or in a press and blow mold, etc. within the spirit and scope of the present invention.

A further advantage is that the inserts may be removed from the outer mold sections without removing the latter from the glass molding machine, thus''facilitating` changing from one job ,or size of glassware to another. `In fact, as many as five different sizes may be made without changing the outer mold sections.

While there has been disclosed in this specification one form in which the invention may be embodied, it is to be understood that this form isshown for the ,purpose of illustration only, and

vthattheiinvention is not limited to the specific disclosure, but may be modified and embodied in various other forms without departing 4from its spirit. In short, the invention includes all the -mQdii'icatiOns and embodiments coming within the scope of the following claims.

Having thus fully described the invention what is claimed as new and for which it is` desired A.to secure Letters Patent is:

1. In a mold for making a hollow `article of glassware, a pair of substantially semi-cylindrical outer cast iron body members, each oisaid members having a rectangular cavity with a fiat base parallel to the abutting jaws of saidmold members, a pair of inwardly` extending ,aligned elongated tapered keys on the sides of saidcavities,

a slidable rectangular, detachable insert in each oisaid cavities and provided with opposed aligned tapered grooves interfitted with said keys, the abutting inner faces oi said insertshaving cavi-- ties which give the inal shape to the glassware blown in said mold and a pair of elongated neat conducting fillers embedded in each body member in abutment with said inserts, said llers having cooling ribs extending out to the circumference of said body members.

2. A mold as defined in claim 1, in which a two-part detachable rectangular neck is located at-the top thereof, resting upon said inserts, and a solid one-piece rectangular base plate is located below said inserts in abutment therewith.

3. A mold as defined in claim 1, in which said cooling ribs are tapered andare arranged in a pluralityof rows.

4. vA mold as donned in claim 3, in which two pairs of outwardly extending Vauxiliary tapered high heat-conducting lateral ns are embedded in said body members in alignment with said keys.

5. A mold as defined in claim 1, in Which the cavities in said .mold members have inwardly extending stop lugs adjacent their lower ends to limit the downward slidingmovement of said inserts.

6. A mold as dened in claim 1, in which both of Ysaid mold body members have semi-circular outwardly-extending aligned annular anges intermediate the upper and lower ends thereof.

References Cited in the ille of this patent UNITED STATES PATENTS 

